Perforating



A. E. HUDSON.

PERFORATING.

APPLICATION msn Nov.14,1919.

1,389,645. Pandsept. 6,1921.

mm. W,

UNITED STATES PATENT OFFICE.

ALBERT E. HUDSON, 0F BEVERLY, MASSACHUSETTS, ASSIGNOR T0 'UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION 0F NEW JERSEY.

PERFOBATING.

Specification of Letters Patent.

Patented Sept. 6, 1921.

To all whom it may concern:

Be it known that I Auannr E. HUDsoN, a citizenof the United tates, residing at Beverly, in the county of Essex and State of Massachusetts, have invented certain Imrovements in Perforating, of which the allowing descri tion, in connection with the accom anyng D like re erence characters on the drawings 1ndicating like parts in the several figures.

This invention relates to perforating, and more particularly to the use of backing members of are frequent ositioned against the stock to be perforate to receive and protect the edge of the .perforating instrument after 1t has assed through the stock. l

en performing a perforatingoperation in the above-mentioned manner it is usual to operate a tubular punch against a piece ofy stock, for example leather, positioned against a strip of pa r, the unch passing into the paper to suc a dept as to insure a clean cut edge to the perforation and being protected from injuiiyl7 through .contact with the punch block by t e interpositlon of the unpenetrated portion of the thickness of thepapcr. U

For many purposes, and with many kinds of stock, very satisfactory results may'be secured in this way, but when operating upon certain kinds of stock, for. example upon heavy` leather impreiated with grease or wax orupon other stic y or tacky material, it has been found that the pills or portions cut outby the punches, remain 1n the holes in the stock instead of in the tubular unches through which they should pass. The reason for this is that the pills, when they are cut out )by the punches, are pressed against the aper strip and, when the punches arev wathdrawn, adhere to the paper strip. Then, as the paper is fed forward,

Y the pills separate from the paper and remain in the punch holes.

An object of my invention, accordingly,

L l l' to preventthe sticking or adhering of the j pills to thebacking member, thus insuring their separationfrom the stock whereby they may be retained by .the punch or punches through which they will then pass rawings, is a specification,

paper or similar material whichv in the desired manner. This I accomplish, when operating upon such stock, through the use of a supplemental piece of paper positioned between the usual paper and the stock to be perforated. The perforating instrument is then operated to pass through and perforate the stock and the supplemental piece of paper adjacent thereto and to penetrate, without passing entirely through, the other or .more remote piece of paper. The tacky pills, as before described, may and often will stick to thel adjacent paper but this does not stick to the other paper and consequently the pills remain in the tubular punches where they belong.

In the drawings,

Figure 1 is a somewhat diagrammatic view, partly in section, of a perforating machine operating in accordance with my invention;

Fig. 2 is a cross sectional view on an enlarged scale showing the relation of a punch to the stock and to the backing members at the conclusion of its erforating motion but before its withdrawal In the drawings, 6 represents the frame of a perfor-ating machine provided with a punch block 8 and with a punch or series of punches 10 operatin thereagainst. An edge gage 12 and a stripper plate 14 of any usual or convenient construction are arranged in operative relation to the punch and punch block. Suitably supported as by brackets 16 is a roll 18 carrying a backing strip 20 of suitable material such as paper which passes across the punch block and is fed along in any convenient manner as by a pair of rolls 24, 26 between which it passes. These rolls carr as illustrated, intermeshing gears 28 an 30 which may be driven in any suitable manner, as by a gear 31.

Carried by a second pair of brackets 32 detachably connected to the main frame as by screws 34 is a roll 36 carrying a sup lemental strip of backing material 38 pre erably of thin hard paper. This strip passes 1 punch block. operating upon sticky or tacky stock such as leather impregnated with waX vor grease,

Stock, to passthrough or perforate the supplemental backing strip 38 and to penetrate without perforating the backing strip 20, as indicated in Fig. 2, the unperforated portion of the thickness of the latter protecting the 'edge of the punch from injury by the Under these circumstances in Y Voperation may be carried out according to the process of my invention or by the machine of my invention on sticky material vwithout difficulty and with assurance that the pills will not stick in the perforations of the stock. VIV-Iaving described my invention, what I -f'clai'm as new and desire Yto secure by Lettersy Patent of the United States is: j Y

1. The process of perforating which consists in positioning the stock yto be perforated against a plurality of superimposed backing members and operating a perforating instrument to perforate the stock and the backing member adj acent'thereto.

2. The process of perforating which consists in positioning the stock to be perforated against two superimposed backing members and operating a p'erforating instrument to perforate the stock and the backing member acent thereto.

3. The process of perforating which consists in positioning the stock to be perforated VVagainst twov superimposed backing members and operating a perforating instrument to p'erforate the stock and the backing member adjacent thereto and to penetrate the backing `member remote therefrom. Y

' Z1. The process of perforating which consists in positioning the stock to be perforated against two superimposed backing members and operating a perforating instrument to perforate the stock and the backing member adjacent thereto and to penetrate without perforating the backing member remote therefrom.

5. The process of perforating which'consists in positioning the stock to 'be perforated against a plurality of superimposed fibrous backing members'and operating a perforating. instrument to perforate the stock and thev backing member adjacent thereto.

6. The process of perforating which consiste in positioning the stock to be perforated against two superimposed fibrous backing 4backing strips to lagainst twoV superimposed paper backing members and operating a perforating instrument to perforate the stock and thebacking member adjacent thereto and to penetrate the backing member more remote'therefrom.

9. The process of perforatingwhich coni sists in positioning the stockto be perforated against a iece of thin hard paper backed by another pleceof paper, and operating a perforating instrument to perforate the stock and the thin hard paper.v I f 10. Y The process of perforating which consists in positioning the stock to be perforated against a piece of thin hardpaper ybacked v by another piece .of paper, andoperating a j perforating instrument to perforate `the stock and the thin hard paper and to penetrate the other piece of paper.

11. In a machine of the class described, a punch, means to sustain a backing strip, i means to sustain a supplemental backing strip between the first backing strip and the 1700..

stock to be perforated, and means to cause the punch to perforate the stock and the supplemental backing strip. f Y

12. In a machine of the class described, a

series of tubular punches, means to lsustain a backing strip, means to* sustainV asupplemental backing strip between the; vfirst backing strip and the stock to be perforated, Y and 4means to causefthe punches to perforate Y the stock andl the vsupplemental backing strip. 13. In a machine of the class described, a punch, means to sustain a vbacking strip,V means to sustain al supplemental backing strip betweenl the first backing strip and the stock to lie-perforated, meansto cause'the punch to perforate the stockvand the supplemental backing strip, and-means to lfeed the( backing strips topresent an unperforated surface to the unch. f '14. In a mac ine of the class described, a punch, means to sustain a backing strip, means to sustain a supplemental backing strip between the first vbacking strip and the"v :stock to be perforated,lmeans to cause the punch to perforate the stock andthe supplemental backingstrip and to penetrate the first backing strip, Yand means to feed the resent an unperforatedV surface to thepuncli. 130

Vso l 15. In a machine of the class described, a and to penetrate the first backing strip, and punch, a support for a backing strip, a pair means to feed the backing strips to present of brackets to sustain a supplemental backan unperforated surface to the punch. 10 ing strip positioned between the first back- In testimony whereof I have signed my 5 ing strip and the stock to be perforated, name to this specification.

means to cause the unch to perforate the stock and the suppiemental backing strip ALBERT E. HUDSON. 

